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    <h5>dart:ui library</h5>
    <ol>
      <li class="section-title"><a href="dart-ui/dart-ui-library.html#classes">Classes</a></li>
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      <li class="section-title"><a href="dart-ui/dart-ui-library.html#properties">Properties</a></li>
      <li><a href="dart-ui/window.html">window</a></li>
    
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      <li><a href="dart-ui/decodeImageFromList.html">decodeImageFromList</a></li>
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      <li><a href="dart-ui/AppLifecycleState-class.html">AppLifecycleState</a></li>
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      <li><a href="dart-ui/TextDirection-class.html">TextDirection</a></li>
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      <li><a href="dart-ui/VertexMode-class.html">VertexMode</a></li>
    
      <li class="section-title"><a href="dart-ui/dart-ui-library.html#typedefs">Typedefs</a></li>
      <li><a href="dart-ui/FrameCallback.html">FrameCallback</a></li>
      <li><a href="dart-ui/ImageDecoderCallback.html">ImageDecoderCallback</a></li>
      <li><a href="dart-ui/PlatformMessageCallback.html">PlatformMessageCallback</a></li>
      <li><a href="dart-ui/PlatformMessageResponseCallback.html">PlatformMessageResponseCallback</a></li>
      <li><a href="dart-ui/PointerDataPacketCallback.html">PointerDataPacketCallback</a></li>
      <li><a href="dart-ui/SemanticsActionCallback.html">SemanticsActionCallback</a></li>
      <li><a href="dart-ui/VoidCallback.html">VoidCallback</a></li>
    
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  <div class="col-xs-12 col-sm-9 col-md-8 main-content">
    <h1>Window class</h1>

    <section class="desc markdown">
      <p>The most basic interface to the host operating system's user interface.</p>
<p>There is a single Window instance in the system, which you can
obtain from the <a href="dart-ui/window.html">window</a> property.</p>
    </section>
    


    <section class="summary offset-anchor" id="instance-properties">
      <h2>Properties</h2>

      <dl class="properties">
        <dt id="alwaysUse24HourFormat" class="property">
          <span class="name"><a href="dart-ui/Window/alwaysUse24HourFormat.html">alwaysUse24HourFormat</a></span>
          <span class="signature">&#8594; <a href="dart-core/bool-class.html">bool</a></span>
        </dt>
        <dd>
          The setting indicating whether time should always be shown in the 24-hour
format. <a href="dart-ui/Window/alwaysUse24HourFormat.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="defaultRouteName" class="property">
          <span class="name"><a href="dart-ui/Window/defaultRouteName.html">defaultRouteName</a></span>
          <span class="signature">&#8594; <a href="dart-core/String-class.html">String</a></span>
        </dt>
        <dd>
          The route or path that the embedder requested when the application was
launched. <a href="dart-ui/Window/defaultRouteName.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="devicePixelRatio" class="property">
          <span class="name"><a href="dart-ui/Window/devicePixelRatio.html">devicePixelRatio</a></span>
          <span class="signature">&#8594; <a href="dart-core/double-class.html">double</a></span>
        </dt>
        <dd>
          The number of device pixels for each logical pixel. This number might not
be a power of two. Indeed, it might not even be an integer. For example,
the Nexus 6 has a device pixel ratio of 3.5. <a href="dart-ui/Window/devicePixelRatio.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="locale" class="property">
          <span class="name"><a href="dart-ui/Window/locale.html">locale</a></span>
          <span class="signature">&#8594; <a href="dart-ui/Locale-class.html">Locale</a></span>
        </dt>
        <dd>
          The system-reported locale. <a href="dart-ui/Window/locale.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="onBeginFrame" class="property">
          <span class="name"><a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a></span>
          <span class="signature">&#8596; <a href="dart-ui/FrameCallback.html">FrameCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked to notify the application that it is an
appropriate time to provide a scene using the <a href="dart-ui/SceneBuilder-class.html">SceneBuilder</a> API and the
<a href="dart-ui/Window/render.html">render</a> method. When possible, this is driven by the hardware VSync
signal. This is only called if <a href="dart-ui/Window/scheduleFrame.html">scheduleFrame</a> has been called since the
last time this callback was invoked. <a href="dart-ui/Window/onBeginFrame.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onDrawFrame" class="property">
          <span class="name"><a href="dart-ui/Window/onDrawFrame.html">onDrawFrame</a></span>
          <span class="signature">&#8596; <a href="dart-ui/VoidCallback.html">VoidCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked for each frame after <a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a> has
completed and after the microtask queue has been drained. This can be
used to implement a second phase of frame rendering that happens
after any deferred work queued by the <a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a> phase. <a href="dart-ui/Window/onDrawFrame.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onLocaleChanged" class="property">
          <span class="name"><a href="dart-ui/Window/onLocaleChanged.html">onLocaleChanged</a></span>
          <span class="signature">&#8596; <a href="dart-ui/VoidCallback.html">VoidCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked whenever <a href="dart-ui/Window/locale.html">locale</a> changes value. <a href="dart-ui/Window/onLocaleChanged.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onMetricsChanged" class="property">
          <span class="name"><a href="dart-ui/Window/onMetricsChanged.html">onMetricsChanged</a></span>
          <span class="signature">&#8596; <a href="dart-ui/VoidCallback.html">VoidCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked whenever the <a href="dart-ui/Window/devicePixelRatio.html">devicePixelRatio</a>,
<a href="dart-ui/Window/physicalSize.html">physicalSize</a>, <a href="dart-ui/Window/padding.html">padding</a>, or <a href="dart-ui/Window/viewInsets.html">viewInsets</a> values change, for example
when the device is rotated or when the application is resized (e.g. when
showing applications side-by-side on Android). <a href="dart-ui/Window/onMetricsChanged.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onPlatformMessage" class="property">
          <span class="name"><a href="dart-ui/Window/onPlatformMessage.html">onPlatformMessage</a></span>
          <span class="signature">&#8596; <a href="dart-ui/PlatformMessageCallback.html">PlatformMessageCallback</a></span>
        </dt>
        <dd>
          Called whenever this window receives a message from a platform-specific
plugin. <a href="dart-ui/Window/onPlatformMessage.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onPointerDataPacket" class="property">
          <span class="name"><a href="dart-ui/Window/onPointerDataPacket.html">onPointerDataPacket</a></span>
          <span class="signature">&#8596; <a href="dart-ui/PointerDataPacketCallback.html">PointerDataPacketCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked when pointer data is available. <a href="dart-ui/Window/onPointerDataPacket.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onSemanticsAction" class="property">
          <span class="name"><a href="dart-ui/Window/onSemanticsAction.html">onSemanticsAction</a></span>
          <span class="signature">&#8596; <a href="dart-ui/SemanticsActionCallback.html">SemanticsActionCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked whenever the user requests an action to be
performed. <a href="dart-ui/Window/onSemanticsAction.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onSemanticsEnabledChanged" class="property">
          <span class="name"><a href="dart-ui/Window/onSemanticsEnabledChanged.html">onSemanticsEnabledChanged</a></span>
          <span class="signature">&#8596; <a href="dart-ui/VoidCallback.html">VoidCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked when the value of <a href="dart-ui/Window/semanticsEnabled.html">semanticsEnabled</a> changes. <a href="dart-ui/Window/onSemanticsEnabledChanged.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="onTextScaleFactorChanged" class="property">
          <span class="name"><a href="dart-ui/Window/onTextScaleFactorChanged.html">onTextScaleFactorChanged</a></span>
          <span class="signature">&#8596; <a href="dart-ui/VoidCallback.html">VoidCallback</a></span>
        </dt>
        <dd>
          A callback that is invoked whenever <a href="dart-ui/Window/textScaleFactor.html">textScaleFactor</a> changes value. <a href="dart-ui/Window/onTextScaleFactorChanged.html">[...]</a>
          <div class="features">read / write</div>
</dd>
        <dt id="padding" class="property">
          <span class="name"><a href="dart-ui/Window/padding.html">padding</a></span>
          <span class="signature">&#8594; <a href="dart-ui/WindowPadding-class.html">WindowPadding</a></span>
        </dt>
        <dd>
          The number of physical pixels on each side of the display rectangle into
which the application can render, but which may be partially obscured by
system UI (such as the system notification area), or or physical
intrusions in the display (e.g. overscan regions on television screens or
phone sensor housings). <a href="dart-ui/Window/padding.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="physicalSize" class="property">
          <span class="name"><a href="dart-ui/Window/physicalSize.html">physicalSize</a></span>
          <span class="signature">&#8594; <a href="dart-ui/Size-class.html">Size</a></span>
        </dt>
        <dd>
          The dimensions of the rectangle into which the application will be drawn,
in physical pixels. <a href="dart-ui/Window/physicalSize.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="semanticsEnabled" class="property">
          <span class="name"><a href="dart-ui/Window/semanticsEnabled.html">semanticsEnabled</a></span>
          <span class="signature">&#8594; <a href="dart-core/bool-class.html">bool</a></span>
        </dt>
        <dd>
          Whether the user has requested that <a href="dart-ui/Window/updateSemantics.html">updateSemantics</a> be called when
the semantic contents of window changes. <a href="dart-ui/Window/semanticsEnabled.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="textScaleFactor" class="property">
          <span class="name"><a href="dart-ui/Window/textScaleFactor.html">textScaleFactor</a></span>
          <span class="signature">&#8594; <a href="dart-core/double-class.html">double</a></span>
        </dt>
        <dd>
          The system-reported text scale. <a href="dart-ui/Window/textScaleFactor.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="viewInsets" class="property">
          <span class="name"><a href="dart-ui/Window/viewInsets.html">viewInsets</a></span>
          <span class="signature">&#8594; <a href="dart-ui/WindowPadding-class.html">WindowPadding</a></span>
        </dt>
        <dd>
          The number of physical pixels on each side of the display rectangle into
which the application can render, but over which the operating system
will likely place system UI, such as the keyboard, that fully obscures
any content. <a href="dart-ui/Window/viewInsets.html">[...]</a>
          <div class="features">read-only</div>
</dd>
        <dt id="hashCode" class="property inherited">
          <span class="name"><a href="dart-core/Object/hashCode.html">hashCode</a></span>
          <span class="signature">&#8594; <a href="dart-core/int-class.html">int</a></span>
        </dt>
        <dd class="inherited">
          The hash code for this object. <a href="dart-core/Object/hashCode.html">[...]</a>
          <div class="features">read-only, inherited</div>
</dd>
        <dt id="runtimeType" class="property inherited">
          <span class="name"><a href="dart-core/Object/runtimeType.html">runtimeType</a></span>
          <span class="signature">&#8594; <a href="dart-core/Type-class.html">Type</a></span>
        </dt>
        <dd class="inherited">
          A representation of the runtime type of the object.
          <div class="features">read-only, inherited</div>
</dd>
      </dl>
    </section>

    <section class="summary offset-anchor" id="instance-methods">
      <h2>Methods</h2>
      <dl class="callables">
        <dt id="render" class="callable">
          <span class="name"><a href="dart-ui/Window/render.html">render</a></span><span class="signature">(<wbr><span class="parameter" id="render-param-scene"><span class="type-annotation"><a href="dart-ui/Scene-class.html">Scene</a></span> <span class="parameter-name">scene</span></span>)
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd>
          Updates the application's rendering on the GPU with the newly provided
<a href="dart-ui/Scene-class.html">Scene</a>. This function must be called within the scope of the
<a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a> or <a href="dart-ui/Window/onDrawFrame.html">onDrawFrame</a> callbacks being invoked. If this function
is called a second time during a single <a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a>/<a href="dart-ui/Window/onDrawFrame.html">onDrawFrame</a>
callback sequence or called outside the scope of those callbacks, the call
will be ignored. <a href="dart-ui/Window/render.html">[...]</a>
          
</dd>
        <dt id="scheduleFrame" class="callable">
          <span class="name"><a href="dart-ui/Window/scheduleFrame.html">scheduleFrame</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd>
          Requests that, at the next appropriate opportunity, the <a href="dart-ui/Window/onBeginFrame.html">onBeginFrame</a>
and <a href="dart-ui/Window/onDrawFrame.html">onDrawFrame</a> callbacks be invoked. <a href="dart-ui/Window/scheduleFrame.html">[...]</a>
          
</dd>
        <dt id="sendPlatformMessage" class="callable">
          <span class="name"><a href="dart-ui/Window/sendPlatformMessage.html">sendPlatformMessage</a></span><span class="signature">(<wbr><span class="parameter" id="sendPlatformMessage-param-name"><span class="type-annotation"><a href="dart-core/String-class.html">String</a></span> <span class="parameter-name">name</span>, </span> <span class="parameter" id="sendPlatformMessage-param-data"><span class="type-annotation"><a href="dart-typed_data/ByteData-class.html">ByteData</a></span> <span class="parameter-name">data</span>, </span> <span class="parameter" id="sendPlatformMessage-param-callback"><span class="type-annotation"><a href="dart-ui/PlatformMessageResponseCallback.html">PlatformMessageResponseCallback</a></span> <span class="parameter-name">callback</span></span>)
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd>
          Sends a message to a platform-specific plugin. <a href="dart-ui/Window/sendPlatformMessage.html">[...]</a>
          
</dd>
        <dt id="updateSemantics" class="callable">
          <span class="name"><a href="dart-ui/Window/updateSemantics.html">updateSemantics</a></span><span class="signature">(<wbr><span class="parameter" id="updateSemantics-param-update"><span class="type-annotation"><a href="dart-ui/SemanticsUpdate-class.html">SemanticsUpdate</a></span> <span class="parameter-name">update</span></span>)
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd>
          Change the retained semantics data about this window. <a href="dart-ui/Window/updateSemantics.html">[...]</a>
          
</dd>
        <dt id="noSuchMethod" class="callable inherited">
          <span class="name"><a href="dart-core/Object/noSuchMethod.html">noSuchMethod</a></span><span class="signature">(<wbr><span class="parameter" id="noSuchMethod-param-invocation"><span class="type-annotation"><a href="dart-core/Invocation-class.html">Invocation</a></span> <span class="parameter-name">invocation</span></span>)
            <span class="returntype parameter">&#8594; dynamic</span>
          </span>
        </dt>
        <dd class="inherited">
          Invoked when a non-existent method or property is accessed. <a href="dart-core/Object/noSuchMethod.html">[...]</a>
          <div class="features">inherited</div>
</dd>
        <dt id="toString" class="callable inherited">
          <span class="name"><a href="dart-core/Object/toString.html">toString</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-core/String-class.html">String</a></span>
          </span>
        </dt>
        <dd class="inherited">
          Returns a string representation of this object.
          <div class="features">inherited</div>
</dd>
      </dl>
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    <section class="summary offset-anchor inherited" id="operators">
      <h2>Operators</h2>
      <dl class="callables">
        <dt id="operator ==" class="callable inherited">
          <span class="name"><a href="dart-core/Object/operator_equals.html">operator ==</a></span><span class="signature">(<wbr><span class="parameter" id="==-param-other"><span class="type-annotation">dynamic</span> <span class="parameter-name">other</span></span>)
            <span class="returntype parameter">&#8594; <a href="dart-core/bool-class.html">bool</a></span>
          </span>
        </dt>
        <dd class="inherited">
          The equality operator. <a href="dart-core/Object/operator_equals.html">[...]</a>
          <div class="features">inherited</div>
</dd>
      </dl>
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